Fig. 1.

The experimental paradigm. A: bimanual movement contexts in dynamic and visuomotor leaning experiments. Center out-and-back movements to 1 of 4 targets were performed either in context A (shown here as Δ180°) or in context B (shown here as Δ0°). Filled targets show an example of a single movement context trial. B: table showing the perturbation and bimanual movement contexts used in experiments 1–4 and S1–S2. C: the experimental paradigm showing perturbation (P1 or P2) and bimanual movement context (A or B) for each batch. Each experiment was comprised of 3 sets, each containing 24 batches of 16 trials. The 1st and last 2 batches in each set were in the null condition. On batches 3–22 of each set, the perturbations always alternated between P1 and P2. Two of the sets were static context sets (A or B). The other set was a switching context set in which the context switched synchronously with the perturbation on each batch. In the example shown here, the 1st set is in context B (static context set), the 2nd is the switching context set (A/B), and the 3rd set is in context A (static context set).